Children around the world know that Earth Day is a holiday to show support for environmental causes, such as tree-planting initiatives or beach cleanups. But it actually started in 1970 as a way to protest the issues concerning the environment. Written in accessible language and with appropriate content, this volume introduces readers to the reasons we still celebrate Earth Day today. It encourages care for Earth and a sense of responsibility for the world around us. Full-color photographs show the beautiful world around us and what readers can do to take part on April 22 next year.